Madeleine O. Hosli is a Professor of Political Science (International Relations) at Leiden University. She is director of the advanced M.Sc. International Relations and Diplomacy. Her main research interests are in international political economy, international organizations and European integration. She is author of The Euro: A Concise Introduction to European Monetary Integration (Lynne Rienner, 2004), co-editor of Decision-Making in the European Union Before and After the Lisbon Treaty (Routledge 2015) and of The Changing Global Order (Springer 2020). She has published widely in peer-reviewed journals, including International Organization, International Studies Quarterly, the Journal of Common Market Studies, European Union Politics, the Journal of European Public Policy, the European Journal of Political Research and the Review of International Organizations.